RFM69HCW/LowPowerLab SendWithRetry function

Hardware: Adafruit Feather 32u4 Radio (RFM69HCW)

Software:  Windows 10, Arduino Sketch App 1.6.11, LowPowerLab

One minor issue I ran into when testing with the ~900mhz RF radio chips the first time was getting the units to retry failed transmissions.  I had chosen to download/utilize the LowPowerLab RFM69 functions to enhance and simplify many of the radio communications methods.  

I initially made the assumption (as most would) that the examples which used sendWithRetry were essentially correct.  And while that is true-ish (in that they work) it is not true that they are showing you the full power of that function.

Better way for beginners to sleep or delay on Arduino

Almost every single Arduino example includes a simple line similar to the following:

• delay(1000)

It is primarily because folks seem to go with a simple one-line solution when focusing on other tasks.  But this continuously leads to the bad practice of beginners on using the Delay() function across the board for anytime they want to "sleep" for X seconds.  While there definitely are situations when you want to use this for the most part you just shouldn't.  Here are some times you would still use delay():